Ice-cutting machine.



H. W. BAHRENBURG & H. MIKKELSEN.

ICE CUTTING MACHINE.

APPLICATION FILED JAN. 9, 1917.

Patented Oct. 29, 1918,

HENRY W. BAHRENBURG OF NEWARK, NEW JERSEY, AND HANS MIKKELSEN, OF BROOKLYN, NEW YORK. I

I ICE-CUTTING MACHINE.

Specification of Letters Patent.

Application filed January 9, 1917. Serial No. 141,366.

' To all whomit may concern:

Be it known that we, HENRY W. BAHREN- BURG, citizen of the United States, and HANS MIKKELSEN, citizen of the Danish Monarchy, and residents of Newark, county ofEssex, State of New Jersey. and Brooklyn, county of Kings, State'of New York, respectively, have invented certain new and useful Improvements in Ice Cutting Machines, 'of which the following is a specification.

The object of our invention is to provide a generally improved ice cuttin machine for cutting ice in the field or inice houses. One of the objects of the invention is to provide a cutting element in the form of a chain havin cuttin 'members of novel and efiicient design an construction specially adapted for cutting ice. Another object isto provide a'construction in which the cutting'element is operated directly by means of an internal explosion motor and to provide suitable supporting means for the latter adapted to mamtain at all times the relative position between the cuttin element and its operating means. Other 0 jects will appear as this specification proceeds.

Accordingly, our invention is embodied'in' an ice cutting machine comprising such parts, elements and combinations thereof as is set forth in the following specification while reference is had to the accompanying drawing in which- Figure 1 is a front elevation of an ice cutting machine embodying ourinvention with parts in section; v p

Fig. 2 is a side elevation looking in the direction of arrow 2 in Fig. -1 with parts broken away;

Figs. 3 and 4 are detail views of the cut ting element. 1

The machine is mounted upon runners 5,

-5, so as to be easil movable on the ice; The

runners may, i desired, be braced or strengthened in any suitable manner not 1ndicated. Secured to each runner is a curved guide member 6 supported by an upright 7. The members 6 and 7 are joined and stiffened by suitable lates or members 8 which form bearings or a shaft 9 operated by a handle 10, shown only in Fig. 1. The opposite end of the shaft carries a ratchet 11. A stop pawl 12 adapted to engage. the ivotally mounted upon the plate 8. The a oresaid elements may be considered the frame structure of the machine.

The cutting element may be a circular saw or be in the form of a cutting chain 13 which is driven by a sprocket wheel 14: and operated upon a carrier'15 in the form of a plate provided with ribs 16 at both edges. 17 deslgnates an idler wheel for the chain journaled in the carrier. The sprocket wheel 14 is fast on a shaft 18 which is driven from the motor shaft 19 by means of .bevel gears 20 and 21. 22 represents the motor. 23 is the fuel tank. and\ 25 the mufller. 26 is the cylinder of the motor. The motor shaft and the gears are inclosed within a suitable casing 27. 28 represents a bearing'bracket for the shaft 18. The carrier plate 15' is secured to the said bearing bracket at 29. 30 is a guard.

The motor is water cooled from a tank 31 and 32, 32 indicate the pipe connections between the tank, the pump 33 and the c linder as shown. 34 is a bracket or foot or 24 the fly wheel 1 the 'motor which is illustrated as being an internal explosion motor of the type known as a detachable,boat motor. We have found this type of motor peculiarly well adapted for the purpose, but do not limit ourselves thereto. The motor is mounted upon the platform 36 which also supports the water tank 31, while the bearing bracket 28 is suspended from said platform, the whole making a compact and strong construction.

During the cutting operation the saw 13 sinks into the ice and means must therefore be provided permitting the saw and the operating means therefor to be lowered; in order to cut and to be raised when the cut is completed. To this end the platform or frame 36 is supported by a pair of links 37 secured tosaid platform while the other end 'passes around a drum 42 fast to the shaft 9.

means are movably mounted relative to the runners and frame of the machine. That is to say, by disengaging the pawl 12 from the ratchet 11 the shaft 9 may be rotated anticlockwise to permit a forward and downward movement of the cutter and the motor on the links 37 and 38. To more clearly illustrate this feature, we have indicated in dotted lines a more inclined position of the In this manner the saw and its operating links with the platform 36 in horizontal po'- sition so that the relative positions of the cutter and the motor 'remam constant. It

is therefore at all times within the power of the operator to lower or raise the cutting element by operating the shaft 9. The pawl 12 acts as a safety stop when the cable is wound up on. the drum 42. The platform 36 ma be moved rearward until the guard 30 strikes against the brace which con- 7 chain. Each inside link is provided with a saw tooth 52 which is wedge shaped or provided with inclined sides 53 to form a cutter in which the cutting portion 54 is of greater width than the base or link portion 50. The outside links are provided with teeth 55 having a cutting portion 56 of greater width than the base or link portion 51. The inner sides of the teeth 55 are parallel while the outer sides 57 are inclined toward each other. In this manner a straight groove '60 is provided which runs upon the ribs 16 of the carrier 15. We have found that because the cutting portions of the teeth are wider than the base or link portions, the chain cuts with ease through the hardest ice without jamming or stopping.

The construction and operation of the machines will be understood from the foregoing description. It will be seen that the saw or cutting chain may be lowered so as to cut into corners and quickly withdrawn in case obstructions are met with. The chain is kept free from ice shavings because the 'links move in a wide path provided by the widened cuttin g portions. The machine is very light yet strong in construction. The guides 6 cause the links toniove in vertical planes and prevents undue side strains.

While we have illustrated and described the preferred form of our invention it is obv1ous that changes in the detailed construethe scope'of the appended claims,

' We claim.

, 1. A machine for cutting ice, comprising a palr ofrunners, a cutting member, actuatmg meansfor said .cutting member, means for ointly supporting said cutting member and said actuating means, said means including parallel links and means for pivot ing said parallel links at one end respectlvely to said pair of runners.

2. A machine for cutting ice,'comprising tion may be made without departing from v a pair of runners, a cutting member, actuating means for said cutting member, driving means of fixed effective length connecting said actuating means with said cutting member, means for jointly supporting said cutting member and said actuating means, said means including parallel links and means for pivoting said parallel links at one end respectively to said pair of runners.

3. A machine for cutting ice, comprising In testimony whereof we have signed'this specification.

HENRY W. BAHRENBURG. HANS MIKKELSEN. 

